AP PhotoUnited States' Michael Phelps waves after finishing first in the men's 200-meter butterfly swimming semifinal at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Monday, July 30, 2012.

BASKETBALL - WOMENKrista Phillips (Canada) - Her six points and four rebounds helped topple host country Great Britain, 73-65, in the second game of Group B play. The Canadians will take on France in their next game on Wednesday at 4 a.m. ET.

GYMNASTICS - MENSam Mikulak (USA) - Had a disappointing final, as he finished no higher than 10th on the four apparatuses on which he competed. Mikulak's highest score was 15.966 on the vault. He earned a 15.266 (12th) on the parallel bars, 14.500 (16th) on the pommel horse and 14.600 (19th) on the floor. The men's team was fifth overall in team competition with a score of 269.952, behind China's , Japan's 271.952, Great Britain's 271.11 and Ukraine's 271.526.

ROWING - MENTom Peszek (USA) - Advanced to the Mens' Pair semifinals by finishing the repechage in 6:27.41, ahead of the Italian team. He and partner Silas Stafford will next compete at 6 a.m. ET on Thursday.

ROWING - WOMENSarah Trowbridge (USA) - Will compete in the Women's Double Sculls repechage on Tuesday at 4:50 a.m. ET after finishing the heats in sixth place among 10 boats with a time of 6:55.25.

SWIMMING - MENTyler Clary (USA) - Made it to the 200-meter butterfly final, which will take place Tuesday at 2:49 p.m. ET. Had the fourth-fastest time 1:54.93 in the semis, just ahead of the 1:54.96 he swam in the heats to earn a spot in the semifinals.

Michael Phelps (USA) - After trailing for much of the 200-meter butterfly, Phelps used a big turn and a strong final 50 meters to win his semifinal in 1:54.53. It was the third-best time overall, and he'll take Lane 6 in the final. He advanced to the semifinals of the 200-meter butterfly by swimming the fifth-fastest time during the heats (1:55.53).

Along with sister, Venus Williams, Serena cruised through the first round of doubles play by beating Sorana Cirstea and Simona Halep, of Romania, 6-2, 6-3. They play again Tuesday at 10:30 a.m. ET, against fifth-seeded Angelique Kerber and Sabine Lisiki, of Germany.

WATER POLO - WOMENBetsey Armstrong (USA) - Saved six of 19 shots she faced to help the United States nip Hungary, 14-13. The Americans' next opponent is Spain, which beat China 11-6, on Wednesday at 11:30 a.m. ET.